Enantioselective Decarboxylative Alkylation of β-Keto Acids to ortho-Quinone Methides as Reactive Intermediates: Asymmetric Synthesis of 2,4-Diaryl-1-benzopyrans

2018 ◽  
Vol 20 (10) ◽  
pp. 2944-2947 ◽  
Author(s):  
Hyun Jung Jeong ◽  
Dae Young Kim
Keyword(s):  
Asymmetric Synthesis ◽  
Reactive Intermediates ◽  
Quinone Methides ◽  
Keto Acids

Tandem [3 + 2] Cycloaddition/1,4-Addition Reaction of Azomethine Ylides and Aza-o-quinone Methides for Asymmetric Synthesis of Imidazolidines

2017 ◽  
Vol 19 (19) ◽  
pp. 5236-5239 ◽  
Author(s):  
Hao Jia ◽  
Honglei Liu ◽  
Zhenyan Guo ◽  
Jiaxing Huang ◽  
Hongchao Guo
Keyword(s):  
Asymmetric Synthesis ◽  
Addition Reaction ◽  
Azomethine Ylides ◽  
Quinone Methides

scholarly journals Asymmetric Synthesis of 2,3-Dihydrobenzofurans by a [4+1] Annulation Between Ammonium Ylides and In Situ Generated o -Quinone Methides

2017 ◽  
Vol 23 (21) ◽  
pp. 5137-5142 ◽  
Author(s):  
Nicole Meisinger ◽  
Lukas Roiser ◽  
Uwe Monkowius ◽  
Markus Himmelsbach ◽  
Raphaël Robiette ◽  
...  
Keyword(s):  
Asymmetric Synthesis ◽  
Quinone Methides

ChemInform Abstract: ortho-Quinone Methides as Reactive Intermediates in Asymmetric Broensted Acid Catalyzed Cycloadditions with Unactivated Alkenes by Exclusive Activation of the Electrophile.

ChemInform ◽  
2015 ◽  
Vol 46 (38) ◽  
pp. no-no
Author(s):  
Chien-Chi Hsiao ◽  
Sadiya Raja ◽  
Hsuan-Hung Liao ◽  
Iuliana Atodiresei ◽  
Magnus Rueping
Keyword(s):  
Reactive Intermediates ◽  
Quinone Methides ◽  
Acid Catalyzed

[4+n] Annulation Reactions Using ortho-Halomethyl Anilines as Aza-ortho-Quinone Methide Precursors

Synthesis ◽  
2021 ◽  
Author(s):  
Xiao-Yu He ◽  
Yu-Hong Ma ◽  
Qing-Qing Yang ◽  
Wen-Jing Xiao
Keyword(s):  
Convenient Method ◽  
Reactive Intermediates ◽  
Quinone Methide ◽  
Synthetic Chemistry ◽  
Important Class ◽  
Quinone Methides ◽  
Aniline Derivatives

Aza-ortho-quinone methides are an important class of reactive intermediates, which have found broad applications in synthetic chemistry. Recently, 1,4-elimination of ortho-halomethyl aniline derivatives has emerged as a new powerful and convenient method for aza-ortho-quinone methide generation. This review will highlight their recent applications as aza-ortho-quinone methide precursors in annulation reactions to access various biologically important nitrogen-containing heterocycles. The general mechanisms are briefly discussed as well.

Organocatalytic Enantioselective Cycloaddition of o ‐Quinone Methides with Oxazolones: Asymmetric Synthesis of Dihydrocoumarins

2020 ◽  
Vol 5 (42) ◽  
pp. 13259-13262
Author(s):  
Kyeong Seop Kim ◽  
Jihoon Jang ◽  
Dae Young Kim
Keyword(s):  
Asymmetric Synthesis ◽  
Quinone Methides

Asymmetric synthesis of spiro-structural 2,3-dihydrobenzofurans via the bifunctional phosphonium salt-promoted [4 + 1] cyclization of ortho-quinone methides with α-bromoketones

2019 ◽  
Vol 6 (22) ◽  
pp. 3799-3803 ◽  
Author(s):  
Song Zhang ◽  
Xiaojun Yu ◽  
Jianke Pan ◽  
Chunhui Jiang ◽  
Hongsu Zhang ◽  
...  
Keyword(s):  
Asymmetric Synthesis ◽  
Phosphonium Salt ◽  
Quinone Methides

A practical and scalable method for highly stereoselective construction of spiro-2,3-dihydrobenzofurans via cyclization of ortho-quinone methides and α-bromoketones by bifunctional phosphonium salt catalysis was developed.

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